Questions and Answers
What is the drip rate for an ordered dose of 250 mg with an available concentration of 100 mg/2 mL?
How many tablets will a patient receive for an ordered dose of 100 mg if available tablets are 0.05 g each?
What is the drip rate in mL/hr for an ordered rate of 8 mcg/kg/hr for a patient weighing 80 kg with an available concentration of 0.64 mg/2 mL?
2 mL
What is the drip rate in mL/hr for an ordered dose of 24 mg over 8 hours with available concentration of 96 mg/4 mL?
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Calculate the mL needed for an ordered dose of 400 mcg with an available concentration of 0.08 mg/0.5 mL.
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What is the drip rate in mL/hr for an ordered dose of 117 mg/kg over 12 hours for a patient weighing 220 lbs with an available concentration of 260 mg/3 mL?
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How many mg will the patient receive after 6 hours for an ordered dose of 6 mL over 12 hours with an available concentration of 120 mg/4 mL?
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Calculate the daily tablet intake for a patient on 196 mg tid using scored tablets of 56 mg each.
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How many mg will the patient receive in one week for an ordered dosage of 1 spray bid from an inhaler with 64 mcg per inhalation?
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What is the drip rate in mL/hr for an ordered dose of 0.03 mg over 8 hours with an available concentration of 6 mcg/2 mL?
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Study Notes
Dosage Calculation Practice Problems
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Dose Ordered vs. Dose Available: Ensure understanding of how to convert between different units, such as mg to g or mcg to mg.
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Card 1:
- Order: 250 mg, Available: 100 mg per 2 mL.
- Calculation: (250/100) × 2 = 5 mL required.
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Card 2:
- Order: 100 mg, Available: 0.05 g tablets.
- 0.05 g equals 50 mg. Required: 100/50 = 2 tablets.
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Card 3:
- Order: 8 mcg/kg/hr for 80 kg patient. Available: 0.64 mg per 2 mL.
- Total dose: 8 × 80 = 640 mcg. Need: (640/640) × 2 = 2 mL to administer.
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Card 4:
- Order: 24 mg over 8 hours, Available: 96 mg in 4 mL.
- Calculation: (24/96) × 4 = 1 mL. Drip rate: 1 mL / 8 hrs = 0.125 mL/hr.
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Card 5:
- Order: 400 mcg, Available: 0.08 mg in 0.5 mL.
- Conversion: 0.08 mg = 80 mcg. Required: (400/80) × 0.5 = 2.5 mL.
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Card 6:
- Order: 117 mg/kg over 12 hours for 220 lbs patient. Available: 260 mg/3 mL.
- Weight conversion: 220 lbs = 100 kg. Total dose calculation: 117 x 100 = 11700 mg.
- Required: (11700/260) × 3 = 45 mL over 12 hours. Drip rate: 45/12 = 3.75 mL/hr.
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Card 7:
- Order: 6 mL over 12 hours, Available: 120 mg/4 mL.
- Total dose: (6/4) × 120 mg = 180 mg over 12 hrs. In 6 hrs, the patient receives half: 180/2 = 90 mg.
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Card 8:
- Order: 196 mg tid, Available: 56 mg scored tablets.
- Per dose: 196/56 = 3.5 tablets. Daily total: 3.5 × 3 = 10.5 tablets required.
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Card 9:
- Order: 1 spray bid, Available: 64 mcg per inhalation.
- Daily dosage: 64 mcg × 2 = 128 mcg. Weekly total: 128 × 7 = 896 mcg = 0.896 mg.
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Card 10:
- Order: 0.03 mg over 8 hours, Available: 6 mcg/2 mL.
- Conversion: 0.03 mg = 30 mcg. Required: (30/6) × 2 = 10 mL over 8 hrs. Drip rate: 10/8 = 1.25 mL/hr.
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Description
Test your knowledge on dosage calculations with these practice problems. Each card presents a different scenario that requires you to determine the correct dosage or rate. Perfect for nursing and pharmacy students to reinforce their understanding of medication dosages.
